As an owner of an Orbit 2...
The Orbit 2, does not have a slide out keyboard. The TyNT 2 does (XDA Stellar). Otherwise, they are very simliar phones.
More shocking than that, and I'm surprised TheReg did not mention this, is the fact the the Orbit 2, like other Polaris phones, has a GPU but HTC have yet to release drivers for this - as a result, graphics acceleration blows on the Orbit 2. This doesn't just effect games, but also video playback. Having said that... allegedly, drivers are on the way for the TyNT 2, and that uses the same GPU, so someone from xda-developers will hopefully have a fix soon.
PH... cause she like the Orbit 2, is pretty to look at.